[PATCH 4/7] libata: add 5s sleep between resets

[Tejun Heo <htejun@gmail.com>]

Some devices react badly if resets are performed back-to-back.  Give
devices some time to breath and tell user that we're taking a nap.

Signed-off-by: Tejun Heo <htejun@gmail.com>

---

 drivers/scsi/libata-core.c |   15 ++++++++++++++-
 1 files changed, 14 insertions(+), 1 deletions(-)

648928e9d46f4d2d8426d83614c101c4a41d789e
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index f8ee314..dfa2b36 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -2577,6 +2577,9 @@ int ata_drive_probe_reset(struct ata_por
 		rc = ata_do_reset(ap, softreset, postreset, 0, classes);
 		if (rc == 0 && classes[0] != ATA_DEV_UNKNOWN)
 			goto done;
+		printk(KERN_INFO "ata%u: softreset failed, will try "
+		       "hardreset in 5 secs\n", ap->id);
+		ssleep(5);
 	}
 
 	if (!hardreset)
@@ -2592,10 +2595,20 @@ int ata_drive_probe_reset(struct ata_por
 
 		if (ata_down_sata_spd_limit(ap))
 			goto done;
+
+		printk(KERN_INFO "ata%u: hardreset failed, will retry "
+		       "in 5 secs\n", ap->id);
+		ssleep(5);
 	}
 
-	if (softreset)
+	if (softreset) {
+		printk(KERN_INFO "ata%u: hardreset succeeded without "
+		       "classification, will retry softreset in 5 secs",
+		       ap->id);
+		ssleep(5);
+
 		rc = ata_do_reset(ap, softreset, postreset, 0, classes);
+	}
 
  done:
 	if (rc == 0 && classes[0] == ATA_DEV_UNKNOWN)
-- 
1.2.4